<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>旋转-折扇效果</title>
    <style>
        body{
            display: flex;
        }
        ul{
            list-style: none;
            position: relative;
            top: 200px;
            margin: auto;
        }
        li{
            position: absolute;
            width: 100px;
            height: 400px;
            transition: 3s;
            transform-origin: bottom center;
            border-radius: 10px;
        }
        li:nth-child(1),li:nth-child(13){
            background-color: #81007f;
        }
        li:nth-child(2),li:nth-child(12){
            background-color: #ffc0c9;
        }
        li:nth-child(3),li:nth-child(11){
            background-color: #ff1494;
        }
        li:nth-child(4),li:nth-child(10){
            background-color: #00bdfd;
        }
        li:nth-child(5),li:nth-child(9){
            background-color: #017f01;
        }
        li:nth-child(6),li:nth-child(8){
            background-color: #fefe00;
        }
        li:nth-child(7){
            background-color: #ff0101;
        }
        li:not(:nth-child(7)){
            opacity: 0;
        }
        ul:hover li:nth-child(1){
            transform: rotate(90deg);
        }
        ul:hover li:nth-child(13){
            transform: rotate(-90deg);
        }
        ul:hover li:nth-child(2){
            transform: rotate(75deg);
        }
        ul:hover li:nth-child(12){
            transform: rotate(-75deg);
        }
        ul:hover li:nth-child(3){
            transform: rotate(60deg);
        }
        ul:hover li:nth-child(11){
            transform: rotate(-60deg);
        }
        ul:hover li:nth-child(4){
            transform: rotate(45deg);
        }
        ul:hover li:nth-child(10){
            transform: rotate(-45deg);
        }
        ul:hover li:nth-child(5){
            transform: rotate(30deg);
        }
        ul:hover li:nth-child(9){
            transform: rotate(-30deg);
        }
        ul:hover li:nth-child(6){
            transform: rotate(15deg);
        }
        ul:hover li:nth-child(8){
            transform: rotate(-15deg);
        }
        ul:hover li{
            opacity: 1;
        }
    </style>
</head>
<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
        <li>6</li>
        <li>7</li>
        <li>8</li>
        <li>9</li>
        <li>10</li>
        <li>11</li>
        <li>12</li>
        <li>13</li>
    </ul>
</body>
</html>